We've talked about what to do with eye makeup after an eye infection hits (boo hoo), but what should you do with lipstick and gloss after recovering from a nasty sickness?

If you had a cold or flue bug, no need to toss your favorite lip gloss or the pricey tube of lipstick. "Your body has built up antibodies against the virus," Neil Schachter, a professor of preventative medicine at Mount Sinai Medical Center in New York City, said in a piece for Real Simple's May issue.

But, there's a big but: If you had strep throat, consider tossing anything that came in contact with your mouth--think, toothbrush, lipstick, gloss, lipliner, etc. "These bacteria may be able to survive longer," he says.